I'm having problems with a game currently. I'm on dashboard 2.0.135 and my firmware is LT 2.0. I tried to play a new XGD3 game which is burn using Max Burner but I need a game update. Tried updating from game but I receive message that to make sure the disc is clean and turn off the console and try again. I downloaded a new dashboard from M$ and used a usb to update but I get E66. Do I need to flash it back to stock firmware, update the dashboard and then flash to LT 2.1?